EVULTIS S.A.

EVULTIS S.A. Patent applications

Patent application number

Title

Published

20110245341

PROCESS FOR THE PREPARATION OF NON-GENOTOXIC DIACETYLRHEIN (DIACEREIN) AND FORMULATIONS COMPRISING NON-GENOTOXIC DIACETYLRHEIN - The present invention is directed to a process for producing non-genotoxic Diacetylrhein (Diacerein), comprising: i) transformation of raw Diacerein (or raw Rhein), into a water-soluble salt; ii) adsorption of the salt Diacerein (or Rhein) solution on a hydrophobic resin; iii) washing with an appropriate solvent to eliminate the impurities (in particular the genotoxic impurities); iv) elution to recover Diacereinor Rhein; v) if the process is applied to Rhein, its transformation to Diacerein by acetylation; vi) acidification of purified Diacerein and its recovery, and drying. The invention is also directed to non-genotoxic Diacerein obtained by the process of the invention, in which the total content of genotoxic impurities is below 1 ppm, and suitable for the preparation of pharmaceutical formulations, in particular capsules, for human and veterinary use, in agreement with the current Health Authorities request.

10-06-2011

20090312293

PROCESS FOR THE ISOLATION OF PHARMACOLOGICALLY ACTIVE PRINCIPLES OF VEGETABLE AND ANIMAL ORIGIN - A process for the recovery and purification of natural hydrophilic water-soluble products in conjugated form from vegetable aqueous extracts or physiological fluids, by adsorption of the extracts or fluids on a lipophilic resin, followed by desorption and recovery of the eluate, which process is characterized in that the resin is a porous styrene-divinyl benzene polymer brominated at the styrene and/or divinylbenzene portion, with 600 m